Wall construction for bake ovens and the like



March 25, 1930. E. o. .ENGELS 1,752,159

WALL CONSTRUCTION FOR BAKE OVENS AND THE LIKE Filed 001;. 29, 1928 r Patented Mar. 25, 1930 EUGENE osoAR ENGELS, oFsAeIuAw, MICHIGAN ASSIGNOR To BAKER-PERKINS I COMPANY, we, or SAG-IN'AW, MICHIGAN, AHCORPOBATION on NEW YORK WALL .coivsrnuor on-ror. BAKE ovEns AND THE LIKE Application filed october 29,

This invention pertains to a bake oven having a heated baking chamber surrounded by anouter, wall of, brickwork, or by a wall consisting of an enveloping layer .ofhea't insulating material enclosedin an outer box-like shell which is supported-by a suitable framework.

My improvement is adapted to be used in peel ovens, plate ovens and other structures of similar nature wherein the heating eleinents areintroduced into a bakingchamber "through apertures in the oven walls, and arrangedin groups, rows or zones.

An object of the invention is to provide means wherebythe burners or heating elements can be easily and quickly changed as regards their number, spacing and arrangement or, grouping. e

,Another object is to facilitate changing so fromone type of heating element to another,

say from gas burners to electric heating units,

or otherwise. v l

The attainment of these objects results in imparting to a bake oven a new. facility for making such rearrangements of its heating units as will enable a single'oven to produce many different kinds of baked goods, and to makethe changes without tearing downthe oven structure or dismantling its conveying go'a'nd other mechanisms.

Bake ovens usually have differently heated -zones for steaming, drying, browning, etc. and these zones may belocated one above the other or horizontally one after the, other, and

" theymay be straight or humped Every oven, .however, requires for its most effective operation a definitedistribution of its heating elements. Q

Heretofore it has beencustomary' to deter- 40 mine before-hand, while planning the oven,

just what shall be the loc'at ion" of eachindividualheating element; Accordingly the heating elements were installed at the prescribed places by projecting them through holes out in the side walls of the oven. Frequently an obstruction in the building, such as a post or wall, would make it necessary to out new holes throughthe oven walls for'reinserting the burners, a very costly and time- ,50 consuming task. Obviously, after such an creasing or decreasing .the'nu'mber of heatspecificatiom my inventign 'comprises, the de- 1828. Serial No. 315,643.

oven had been put into service, any error of judgment in locating the burners couldbe rectified only by making new holes through the wall ofthe baking chamber and through the outer wall of the iovenand through the insulating material between the two walls, in order topermit the burners to be shifted to their proper position, and afterwards the walls had to be repaired by patching. This work had to be done whether the change of location was merely a small matter of a few inches, or a change of severalfeet.

Sometimes it even becomes desirable to change the overalllength of an oven after it has been put into use. Heretofore achange 5 in length necessitated tearing downthe oven in order to, make such rearrangements of its burners or heating elements as was imposed by the new length.

My improvement enablesall such major and minor changes in burnerlocations, for whatever reason, to be made cheaply and expeditiously, so that it becomes almost a mere matter of choice with the baker as to whether he shall alter the length of his oven, rearrange the heating zones, or otherwise shift the burners in order to do a different kind of baking. His choice can be put into effect without undue expense or delay in the operation of the plant. a Y

' The invention also enables an oven that is equipped at the outset with gas burners of the open flame type, or with'burners of the enclosed tubular type, or with electric heating 7 units, to be changed to any other type. The v change from one kind of. heating element to another can be made easily and quickly without cutting holesthrough' the walls of the oven or otherwise interfering with its original construction. v 90.

The improveinent furthermore provides a ready means for adapting the oven to changed baking requirementsfrom timeto time by ining elements, thereby imparting to the oven extreme flexibility'for variety baking. 7 With the foregoing and certain other objects in view, which will appear later in the vices described and claimed and the equivalents thereof.

In the drawings Fig. 1 is a diagrammatic View of a tunneltype oven in perspective, showing a variety of slots in the oven walls, corresponding to various baking zones.

Fig". 2 isa fragmentary view of anoven wall embodying my invention, the outer panel being removed from part of the area'shown,

' f,The essential feature of my invention isan elongated slot 4 formed in the wall; In the type of wall shown the slot 4 extends through the sheet metal wall 1 of the baking chamber, 7 through the insulating material '3 .and

throughthe outer ovenw all 2.

a The heatingelements5, of whatever kind, are inserted "in spaced relation intothe bakjing chamber through this slot, as indicated The slot allows anyor allof them 'to be shifted sldewise to ad3ust the r spaced relations as cond tions imay require, and

means is provided to fasten them in any desi redlocation, along the length of the slott. After the heating elementstare in place the cover plates'6, 6 for the slot of the baking chamber wall are cuttogappronriatelengths and attached to complete the closureof that p ofthe a i g 'hemlee wal be weenthe I 11 38 9 15;fi illel ti -Th -SPFIEQB be e n ene "bu ner-and then x and between. th bak chamber and the outer oven wall ;2-is filled with insulating materia .3, a d la tly the ;.e. 1 -si. e .Wall panel :a la ta hee A e to th izi e ie e jth baking Ch mbe m ybe .hadanywher ng th leng h peas. $19 A ine-rely removing the appropriate panel fiaoilt r lw, ta inaa a y'th -,int tenin vsecti n o th in u atinawal and t en. e

m rits r' h e r p ndinsrle Be le? e thebaking chamber wall.

' In the embodiment-of the imprnvement seleete i r pu pos .e deeerip ipnt bur ..i,s show asbeing reeeiv dinan outertub larjacket7 that communicates witha-holein bu ne H Ram/1,6 This. arrangement, ,tlated Figs. .2 and; 4:, the so ealled indir -,h. .a a rangem n t ithe b n r ny admitting of a1teringthe'i ei' employed without departing from my invention as set forth in certain of the claims.

The means for removably clamping the burner panels 6 and the intermediate panels 6 in place over the slot 4 in the baking cham ber wall is,'preferably, to provide removable stay-'barsj-8 and thrust bolts 9 thereon for pressing the panels 6, 6 against the marginal edges that define the slots 4, as shown in Fig.2. ;-Cap:bolts-;9?*, threaded into the angle 'above slot t nayalso employedifldesired.

' The claimed invention in its broader aspects is not confined to: this specific method of fastening the panels to the margins of the Wall around the slot.

-Ha ing huer e e bedmy invent n, W

imland r esi zete-seeu e by Lett 'Patent is:

.li ake e nc u ing a ba ngehember whose side wall is formed with a slot,

' r P at ving p nins heatin ments registering with said openings andlproa jecting in spaced relation through said slot and. in a b king ehamber,e i 1'element with their respective plates adapted for independent adjustment of said spaced relation in the direction of the length o'fsaid slot, in-. dependently removable closure panels for said slot between said cover plates, ,and ta eningmea fo ,se ur ngsaid platesand p nel t sa sid Wal 2- A a eve hos s de Wal i ormed with a slot therethrough, heating elements projecting in spaced relation through said sl and t theovei s i lement eh f b ide isei in e! s o and nthe. ir c ion f it length, closure panels for said slotand fastenl ng mean r me ab y s eming saidpene to sa WQH- Y a e h vi g wa lf me f'wi h eel retl eilgh, h a ng el m nt r fleei ed i th as and Proj ctin pa rel tion int ltheev ne idm lmte inamede -e d telet e in the direction of the lengthiof the slo nd lesu e li e s i .ele .ane til eld t0 .ri e 1v Lteieai Wal .1 bak ven ha i g a sidewa fo m with a slottherethrou'gh, a heating element .reeei edinthe le nd preieet nghimelfh eve nd mounted .i a e admit ing. o altering itslocation'in the slot in the direct on o length ,ef .th is t, n v closure {fer 's' ai d slot removably secured to said :wall.v

in tes im ny w o la ixiny ign u e .EUG TQSGABinNeELS- ethe ar a me e th lbua r Y irit l speet t th sslotA i t -ev n wall, or wi V la aeemhe s e eble k ane f .6 aw b sai heatingel meiit e and. remeva lygse gi d 

